clean washed concord grapes (stems and twigs removed
sugar (1/4 - 1/2 cup per pint/quart jar - optional)
water
Instructions
You will want to take your cleaned grapes and run them through your food mill or food press or another mixer with a strainer.
Grind the grapes up, separating from the seeds and extracting the juice into a large bowl.
If you are using the electric strainer, you will want to run at a slow speed. The seeds can bind up. You will also want to clean out the strainer after running through about 2 cups or it will stop working.
Once the grapes have been run through, you can run the juice through the mesh strainer. Depending on how much pulp you want in your juice.
Take the juice and heat it to 190 degrees F for 10 minutes. Remove from heat once this is done.
You can allow to cool over night for the sediment to settle, or continue canning.
Take the sterilized jars and add 1/4 cup to 1/2 cup sugar (if desired) to each jar.
Add grape juice into each jar, leaving 1" head space (straining again if desired).
Place a sterilized seal and hand tighten band on each jar.
Place hot jars into hot water bath canner, with 1 inch of water over the jars.
Process for 15 minutes for pints or quarts.
Allow jars to sit 5 minutes before removing from water bath. If you don't the juice could boil out of the jar.
Remove the jars from the heat and allow to cool for 12 hours (we put towels around them to have the cool slowly)
Write the date and that it's concentrated grape juice on the label or seal. Check to make sure lids sealed.